Hyundai Santa Cruz (NX4A OB) 2021-2025 Service Manual / Engine Control / Fuel System / Engine Control System / Intake Air Temperature Sensor (IATS)

Hyundai Santa Cruz: Engine Control System / Intake Air Temperature Sensor (IATS)

- Description Mounted inside the Manifold Absolute Pressure Sensor, Intake Air Temperature Sensor (IATS) detects the intake air temperature.To precisely calculate the amount of air, correction of the air temperature is required as the air density varies with the temperature. So the ECM uses not only MAPS signal but also IATS signal. This sensor has a Negative Temperature Coefficient (NTC) thermistor with resistance in reverse proportion to the temperature.

- Specification ▷ Type : Thermistor type

Intake temperature [°C, (°F)]	Resistance (kΩ)
-40 (-40) ± 1	38.70 - 50.59
-20 (-4) ± 1	13.14 - 16.77
0 (32) ± 1	5.10 - 6.37
20 (68) ± 1	2.19 - 2.69
25 (77) ± 1	1.80 - 2.20
40 (104) ± 1	1.02 - 1.26
60 (140) ± 1	0.51 - 0.65
80 (176) ± 1	0.28 - 0.35
100 (212) ± 1	0.16 - 0.21
120 (248) ± 1	0.10 - 0.13
130 (266) ± 1	0.08 - 0.10
150 (302) ± 1	0.05 - 0.07

- Circuit Diagram

Harness Connector

- Inspection

1. Switch "OFF" the ignition.

2. Disconnect the IATS connector.

3. Measure resistance between the IATS terminals 1 and 2.

4. Check that the resistance is within the specification.

Specification : Refer to "Inspection"

- Removal

1.Turn ignition switch OFF and disconnect the battery negative (-) cable.

2.Disconnect the manifold absolute pressure sensor (MAPS) connector (A).

3.Remove the mounting bolts (B), and then remove the sensor from the intake manifold.

Tightening torque :8.8 - 10.7 N.m (0.9 - 1.1 kgf.m, 6.5 - 7.9 lb-ft)

- Installation

• Install the component to the specified torques.

• If a part is dropped, replace it with a new one and discard the dropped part as invisible damage may be caused.

• Insert the sensor in the installation hole and be careful not to damage it.

1.Install in the reverse order of removal.

Manifold Absolute Pressure Sensor (MAPS)

- Description Manifold Absolute Pressure Sensor (MAPS) is a speed-density type sensor installed on the surge tank. It senses absolute pressure of the surge tank and transfers the analog signal ...

Boost Pressure Sensor (BPS)

- Description Boost pressure sensor (BPS) is installed on top of intercooler output pipe to measure the absolute intake manifold pressure. - Specification ▷ Type : Piezo-resistive pressure ...

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